One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,11)(8,9)(10,12)(13,14,17,16)(15,19,20,18)(22,23)(24,28)(5,6,8,9)(7,11,12,10)(13,15)(14,18)(16,19)(17,20)(22,23)(26,27)(6,9)(10,11)(15,20)(18,19)(21,22,25,23)(24,26,28,27)(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,15)(14,19)(16,18)(17,20)(21,23,25,22)(24,27,28,26)(5,7,8,12)(6,10,9,11)(13,16,17,14)(15,18,20,19)(21,24,25,28)(22,26,23,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.